Once per day, the bearer can shatter the Silmaril’s outer shell (a conscious, irreversible act) to release the light within. When released:
: The gems did not merely reflect light; they were "alive" with the blended gold and silver radiance of the Two Trees, which Fëanor had captured through a secret and unrepeatable labor. silmaril
Fëanor and his seven sons swore a terrible oath to reclaim the jewels from anyone—Elf, Man, or Vala—who might withhold them, leading to centuries of tragedy and "kinslayings" among the Elves. Morgoth's Crown: Morgoth set the Silmarils into his Iron Crown Once per day, the bearer can shatter the
The Silmarils became objects of extreme desire, leading to the central tragedies of The Silmarillion : Morgoth's Crown: Morgoth set the Silmarils into his
Here's a brief overview:
While Morgoth held all three gems, one was eventually recovered through the most famous romance in Tolkien’s lore: the tale of Beren and Lúthien. Beren, a mortal man, and Lúthien, an Elven princess, managed to infiltrate Morgoth’s fortress of Angband. Lúthien’s song put the Dark Lord to sleep, allowing Beren to cut a single Silmaril from the iron crown.